UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Form 11-K
FOR ANNUAL REPORTS OF EMPLOYEE STOCK PURCHASE, SAVINGS
AND SIMILAR PLANS PURSUANT TO SECTION 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934
(Mark One)
¥
ANNUAL REPORT PURSUANT TO SECTION 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended December 31, 2008
OR
n
TRANSITION REPORT PURSUANT TO SECTION 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from
to
Commission File Number 33-57687
ATMOS ENERGY CORPORATION RETIREMENT
SAVINGS PLAN AND TRUST
(Full title of the plan and the address of the
plan, if different from that of the issuer named below)
ATMOS ENERGY CORPORATION
Three Lincoln Centre, Suite 1800
5430 LBJ Freeway
Dallas, Texas 75240
(Name of issuer of the securities held
pursuant to the plan and the
address of its principal executive office)
ATMOS ENERGY CORPORATION RETIREMENT
SAVINGS PLAN AND TRUST
FINANCIAL STATEMENTS
AND SUPPLEMENTAL SCHEDULES
AS OF DECEMBER 31, 2008 AND 2007
AND FOR THE YEAR ENDED DECEMBER 31, 2008
CONTENTS
Page
Number
Report of Independent Registered Public Accounting Firm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
Audited Financial Statements:
Statements of Net Assets Available for Benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
Statement of Changes in Net Assets Available for Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
Notes to Financial Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
Supplemental Schedules:
Schedule H, Line 4a — Schedule of Delinquent Participant Contributions. . . . . . . . . . . . . . . . . . . .
11
Schedule H, Line 4i — Schedule of Assets (Held At End of Year) . . . . . . . . . . . . . . . . . . . . . . . . .
12
Signatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13
Exhibits Index . . . . . . . .